AMD Radeon HD 8870 OEM vs AMD Radeon HD 7870 GHz Edition
What is the difference between AMD Radeon HD 8870 OEM and AMD Radeon HD 7870 GHz Edition. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Pitcairn | GPU Name | Pitcairn |
| Pitcairn XT (215-0828047) | Model number | Pitcairn XT (215-0828047) |
| GCN 1.0 | Architecture | GCN 1.0 |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 28 nm |
| 2,800 million | Transistors | 2,800 million |
| 212 mm² | Die Size | 212 mm² |
Graphics Card
| Jan 8th, 2013 | Release Date | Mar 5th, 2012 |
| Sea Islands (HD 8800) | Family | Southern Islands (HD 7800) |
| End-of-life | Production | End-of-life |
| Southern Islands | Predecessor | Northern Islands |
| PCIe 3.0 x16 | Bus Interface | PCIe 3.0 x16 |
Memory
| 2 GB | Memory Size | 2 GB |
| GDDR5 | Memory Type | GDDR5 |
| 256 bit | Memory Bus | 256 bit |
| 153.6 GB/s | Bandwidth | 153.6 GB/s |
Performance
| 32.00 GPixel/s | Pixel fillrate | 32.00 GPixel/s |
| 80.00 GTexel/s | Texture fillrate | 80.00 GTexel/s |
| 2.560 TFLOPS | FP32 (float) performance | 2.560 TFLOPS |
| 160.0 GFLOPS (1:16) | FP64 (double) performance | 160.0 GFLOPS (1:16) |
Clock Speeds
| 1200 MHz 4.8 Gbps effective | Memory Clock | 1200 MHz 4.8 Gbps effective |
| 1000 MHz | GPU Clock | 1000 MHz |
Render Config
| 1280 | Shading Units | 1280 |
| 80 | TMUs | 80 |
| 32 | ROPs | 32 |
| 20 | Compute Units | 20 |
| 16 KB (per CU) | L1 Cache | 16 KB (per CU) |
| 512 KB | L2 Cache | 512 KB |
Board Design
| Dual-slot | Slot Width | Dual-slot |
| 241 mm 9.5 inches | Length | 241 mm 9.5 inches |
| 175 W | Thermal design power (TDP) | 175 W |
| 450 W | Suggested PSU | 450 W |
| 1x DVI 1x HDMI 2x mini-DisplayPort | Display Connectors | 1x DVI 1x HDMI 2x mini-DisplayPort |
| 2x 6-pin | Power Connectors | 2x 6-pin |
| C401 | Board Number | C401-47 |
API support
| 12 (11_1) | DirectX | 12 (11_1) |
| 4.6 | OpenGL | 4.6 |
| 1.2 | OpenCL | 1.2 |
| 1.2 | Vulkan | 1.2 |
| 5.1 | Shader Model | 5.1 |